Recent content by k-shell

Hi, I'm in need of a powerful light source for cutting polyamide organic films like Kapton on a cnc machine. I'm assuming any wavelength between 405 to 475 would suffice with an output power between a true 2 to 4 watts. any style of laser would work regardless if it's a module with external...

hi, I have a benchtop cnc that id like to fit a laser onto for making laser cut solder paste stencil from kapton sheets. my only issue is im uncertain as to what wavelength would be optimal and what kind of output power I would need. I was wondering if anyone here could help me find a decent...

I am looking for a 200mw 523nm for a collimator to a 20" primary F/5 mirror with a good power uniformity as poor quality will be greatly amplified over that area. Thanks for the help. Grant Olsen

Hello, I need something that is light weight, has a high output power and gives off a lot of green light (something like a laser but i dont need a tight beam...). i dont necessarily need it with a lens or a pen housing either, requirements: *light weight (less than 0.5lbs - 8oz) 200mw -...

exactly! we estimate that this entire xray source if designed correctly may only weigh ~40 grams (plus the power supplies and controller components)

depends... in the shadow of the earth it is yes very cold! but you have to consider there is no air or gas in space to pull the heat from an object convectionaly. plus there are no large solid objects to conduct the heat to either. so that means that the only way to dissipate heat in space would...

price for a single flat window 240nm LED is $309 from s-et.com. and it looks like they can only produce 40 µW, hmm..

absolutely perfect!!! Thank You HIMNL9!!! :D

I was wondering if anyone knows where i could find any diodes that emit wavelengths shorter than 368nm???? also, our tests require that we try a verity of different wavelengths. so it would be nice to find a verity of diodes that span through different parts of the UV spectrum.. Thanks for any...

i have a few more questions, like pullbangdead said, using an inductive current probe would be a great idea. i would like to test this and was wondering if i might be able to make this probe myself? ive used them before and i dont think their very complicated, looks like just a piece of iron or...

yes, the pulse generator im using has the ability to limit the voltage but not the current. and i am using an oscilloscope to measure the peak voltages to the diode. so in this configuration i can only see the voltages.. im sure there would be a way to configure the scope to measure the voltage...

yea sry bout that, i was at work and didnt really have time to track that pdf down. So does anybody have any idea how fast one of the PHRs might be able to be pulsed? I need to get a decent burst of photos out of a 10 nanosecond pulse. im not using a driver circuit but a function/pulse...

maybe this will end the confusion: http://gsfctechnology.gsfc.nasa.gov/TechSheets/XRAY_Goddard_Final.pdf in the diagram it shows a UV LED as the excitation source, instead of an LED i am experimenting with laser diodes. I work very closely with Keith (the scientist picturepd in the article)...

Goddard Space Flight Center (GSFC) in greenbelt maryland, Astrophysics and exploration sciences building. What kind of projects were you working on when you were at nasa??

not quite... your interpretation of what i was explaining is wrong. its satellite to satellite communications in a vacuum, and the diode is only the excitation source for the production of xrays.